Koster Mortar Tight 10kg Waterproof Render Additive
Koster Mortar Tight is used to create a waterproof render, screed or simple sealing slurry on the construction site using sand, cement, and water. Koster Mortar Tight is added to the mixture as an additive.
Koster Mortar Tight improves the density of the mortar structure. It makes the mortar water-repellent (hydrophobic) and promotes self-healing of microcracks through crystallisation. As a result, the mortar becomes waterproof and the capillary absorption capacity is reduced.
Koster Mortar Tight is free of chlorides and nitrates.
Koster Mortar Tight increases the impermeability of mortars and slurries against ground moisture, hydrostatic pressure, and driving rain. It is used for the production of waterproof renders, screeds and slurries for internal waterproofing of underground structures such as basements or swimming pools.
It can also be used externally for the production of water-repellent renders and in various other areas where a waterproof mortar is required, e.g. for tanks, shafts masonry, etc.
Consumption
For waterproofing basements against pressurised water 1kg per 10ltrs water.
By weight (assumed bulk density: cement 1.1 kg/l; sand 1.45 kg/l):
Cement | Sand | Water | Koster Mortar Tight | |
Sealing Mortar | 25kg | 50kg | 10kg | 1kg |
Sealing Slurry | 25kg | 33kg | 10kg | 1kg |
Floor Screed | 25kg | 100kg | 10kg | 1kg |
Application
Koster Mortar Tight is added to the mixing water. The container should be well shaken before use. Ensure a through mixing of the mortar afterwards.
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